I hate it when I forget that I am outside of the EU and get a 100$ roaming bill for net usage by just stepping out of the airport. Then I get the overuse alert

I hate it when I forget that I am outside of the EU and get a 100$ roaming bill for net usage by just stepping out of the airport. Then I get the overuse alert from my telco and turn off roaming. EU citizens request the native support of "EU roaming" in the phone's OS!